/* ─── 韵达广告 · 品牌基建统一样式 ─── */
:root {
  --primary: #1a3a5c;
  --primary-light: #2b5c8a;
  --accent: #c8553d;
  --accent-light: #e07a5f;
  --gold: #d4a853;
  --gold-light: #f0d98a;
  --bg-light: #f8f7f4;
  --bg-white: #ffffff;
  --text-dark: #1a1a2e;
  --text-muted: #5a6a7a;
  --border: #e5e2dc;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.1);
}

* { margin:0; padding:0; box-sizing:border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.7;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.site-header {
  background: var(--primary);
  color: #fff;
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.site-header .brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.site-header .brand span { color: var(--gold); }
.site-header .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.site-header .nav-links a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  padding: 4px 12px;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: all 0.2s;
  white-space: nowrap;
}
.site-header .nav-links a:hover { color: #fff; background: rgba(255,255,255,0.1); }
.site-header .nav-links a.active { color: #fff; font-weight: 600; background: rgba(255,255,255,0.12); }

.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 32px 0 24px;
  margin-top: 60px;
  font-size: 0.85rem;
  line-height: 2;
}
.site-footer strong { color: #fff; }

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: 64px 0 56px;
  text-align: center;
}
.hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; letter-spacing: 1px; }
.hero h1 span { color: var(--gold); }
.hero p { font-size: 1.05rem; opacity: 0.85; max-width: 640px; margin: 0 auto; }
.hero .subtitle { margin-top: 6px; font-size: 0.9rem; opacity: 0.65; }

.section { padding: 48px 0; }
.section-title {
  text-align: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 36px;
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin: 12px auto 0;
  border-radius: 2px;
}

.card {
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  transition: box-shadow 0.3s, transform 0.2s;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}
.tag-tier1 { background: #e3f2fd; color: #1565c0; }
.tag-tier2 { background: #fff3e0; color: #e65100; }
.tag-tier3 { background: #fce4ec; color: #c62828; }
.tag-gold { background: #fff8e1; color: #b8860b; }

.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(200,85,61,0.3); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-light); color: var(--primary); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.6rem; }
  .site-header .nav-links { flex-wrap: wrap; justify-content: center; }
}

@media print {
  .site-header, .site-footer, .btn, .no-print { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; }
}

.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item { position: relative; margin-bottom: 28px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-white);
}
.timeline-item h3 { font-size: 1rem; color: var(--primary); margin-bottom: 4px; }
.timeline-item p { font-size: 0.9rem; color: var(--text-muted); }